Homogeneous membranes permeable to oxygen and glucose composed of hydrophilic polyurethanes that are capable of absorbing from 10 to 50% of their dry weight of water. Variations in the composition of the hydrophilic polyurethanes make possible the fabrication of membranes in which the ratios of the ...

Homogeneous membranes are disclosed which are composed of acrylic copolymers and are capable of absorbing 10% to 50% of their dry weight of water. The copolymers include a hydrophilic component which comprises acrylic esters having a poly(ethylene oxide) substituent as part of the alcohol moiety. Th ...

Lactic-glycolic copolymers having molecular weights of about 6000 to about 35000 are prepared by condensation of lactic acid and glycolic acid in the presence of readily removable strong acid ion-exchange resins.

Homogeneous membranes are disclosed which are composed of acrylic copolymers and are capable of absorbing 10% to 50% of their dry weight of water. The copolymers include a hydrophilic component which comprises acrylic esters having a poly(ethylene oxide) substituent as part of the alcohol moiety. Th ...

Novel nail coating formulations containing aqueous emulsion polymers which have a T.sub.g range from about -10.degree. C. to 50.degree. C., a solids content from about 30 to 55 percent, and a moisture vapor transmission of the film from about 0.1 to 1.6 mg./cm..sup.2 /hr. have improved properties, s ...

This electronic meter signalling device provides a means for converting a conventional meter or gauge into an electronic switch in which a number of electronic outputs indicative of conditions of the meter or gauge are provided. The meter signalling device comprises a capacitive coupling means used ...